that your equipment is listed on the list of compatible equipment or that your product manual/parts diagram calls for the 6020018/350099 o-ring part number or one of the other part numbers listed on this product page. Rubber Construction: These pool pump fittings are made employing premium grade, rubber material, creating a perfect seal for a leak-free experience. The rubber gasket works as a o-ring adapter replacement, perfect for both professionals, and homeowners when installing a new swimming pool pump. Color: Black Material: Rubber Package Contents: 5 x Pool replacement o rings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.